解个方程.7x-2x^2=-27x-2x^2=-2求x的值

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解个方程.7x-2x^2=-27x-2x^2=-2求x的值解个方程.7x-2x^2=-27x-2x^2=-2求x的值解个方程.7x-2x^2=-27x-2x^2=-2求x的值(-7+根号65）/-4(

解个方程.7x-2x^2=-27x-2x^2=-2求x的值
解个方程.7x-2x^2=-2
7x-2x^2=-2
求x的值

解个方程.7x-2x^2=-27x-2x^2=-2求x的值
(-7+根号65）/-4
(-7-根号65）/-4

7X-2X^2=-2
-2X^2+7X+2=0
2X^2-7X-2=0
X1=(7+根号65)/4
X2=(7-根号65)/4